EXHIBIT 32.1 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2003 In connection with the Annual Report of Petroleum Helicopters, Inc. (the "Company") on Form 10-K for the period ending December 31, 2003 (the "Report"), I, Lance F. Bospflug, Chief Executive Officer of the Company, certify that: (1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company. Petroleum Helicopters, Inc. By: /s/ Lance F. Bospflug ----------------------------------- Lance F. Bospflug President & Chief Executive Officer March 15, 2004